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目的研究鼓膜厚度和硬度对人耳传声的影响。方法利用CT获取志愿者耳部结构临床资料,使用Matlab软件提取相关结构的边界,将边界文件导入ANSYS建立人耳结构数值有限元模型。结果利用本文人耳数值模型,在外耳道口施加105dB声压,进行200～8000Hz频率范围的谐响应分析。以此研究在鼓膜病变情况下,鼓膜和镫骨底板位移幅值的变化规律。结论用数值方法解释了鼓膜病变对传声的影响,为鼓膜修补提供了力学参考。
Objective To study the effect of tympanic membrane thickness and hardness on human ear transmission. Methods The clinical data of the ear structures of volunteers were obtained by CT, and the boundaries of related structures were extracted by using Matlab software. The boundary files were imported into ANSYS to establish the numerical finite element model of human ear structure. Results Using the human ear numerical model, 105 dB sound pressure was applied to the external auditory canal to analyze the harmonic response in the frequency range of 200-8000 Hz. In order to study the case of tympanic membrane lesions, tympanic membrane and the floor of the tarsal displacement amplitude changes. Conclusion The numerical method is used to explain the effect of eardrum on acoustic transmission, which provides a mechanical reference for eardrum repair.